From: Jordan Crouse <[email protected]> commit 7b3f3948c8b7053d771acc9f79810cc410f5e2e0 upstream.
Temporarily disable preemption on a5xx targets pending some improvements to protect the RPTR shadow from being corrupted. Cc: [email protected] Signed-off-by: Jordan Crouse <[email protected]> Signed-off-by: Rob Clark <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -1510,7 +1510,8 @@ struct msm_gpu *a5xx_gpu_init(struct drm check_speed_bin(&pdev->dev); - ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 4); + /* Restricting nr_rings to 1 to temporarily disable preemption */ + ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1); if (ret) { a5xx_destroy(&(a5xx_gpu->base.base)); return ERR_PTR(ret);
